Efficacy of a gravity-independent resistance exercise device as a countermeasure to muscle atrophy during 29-day bed rest

Aim:  This study determined changes in knee extensor and plantar flexor muscle volume during 29 days of bed rest with or without resistance exercise using a gravity‐independent flywheel ergometer. Methods:  Seventeen men (26–41 years) were subjected to 29 days of bed rest with (n = 8) or without (n ...

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Bibliographic Details
Published in:Acta physiologica Scandinavica 2004-07, Vol.181 (3), p.345-357
Main Authors: Alkner, B. A., Tesch, P. A.
Format: Article
Language:English
Subjects:
Adult
Applied physiology
Bed Rest - adverse effects
Biological and medical sciences
concentric and eccentric muscle actions
electromyography
Electromyography - methods
Ergometry - instrumentation
Ergometry - methods
Exercise Therapy - instrumentation
flywheel resistance exercise
Fundamental and applied biological sciences. Psychology
Fysiologi
Fysiologi och farmakologi
Human physiology applied to population studies and life conditions. Human ecophysiology
Humans
Idrott
Idrottsvetenskap
INTERDISCIPLINARY RESEARCH AREAS
magnetic resonance imaging
Magnetic Resonance Imaging - methods
Male
Medical sciences
MEDICIN
MEDICINE
muscle size
Muscle, Skeletal - pathology
Muscle, Skeletal - physiopathology
Muscular Atrophy - etiology
Muscular Atrophy - pathology
Muscular Atrophy - prevention & control
Physiology
Physiology and pharmacology
spaceflight
Sport scence
Sports
strength training
Striated muscle. Tendons
Transports. Aerospace. Diving. Altitude
TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN
Vertebrates: osteoarticular system, musculoskeletal system
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Summary:Aim:  This study determined changes in knee extensor and plantar flexor muscle volume during 29 days of bed rest with or without resistance exercise using a gravity‐independent flywheel ergometer. Methods:  Seventeen men (26–41 years) were subjected to 29 days of bed rest with (n = 8) or without (n = 9) resistance exercise; Supine Squat (SS) and Calf Press (CP) performed every third day. Quadriceps and triceps surae muscle volume was determined before and after bed rest and force and power were measured during training. Prior to these interventions, reproducibility of this device for training and testing was assessed in 23 subjects who performed bilateral maximal concentric, eccentric and isometric (MVC) knee extensions and plantar flexions over repeated sessions with simultaneous measurements of force, power and electromyographic (EMG) activity. Results:  Quadriceps and triceps surae muscle volume decreased (P 
ISSN:0001-6772
1365-201X
DOI:10.1111/j.1365-201X.2004.01293.x